# Generated by OpenSesame 0.27.2~pre5 (Frisky Freud)
# Tue Apr 23 11:29:21 2013 (posix)
# <http://www.cogsci.nl/opensesame>

set foreground "white"
set subject_parity "even"
set description "A template containing a practice and an experimental phase"
set title "Extended template"
set compensation "0"
set coordinates "relative"
set height "768"
set mouse_backend "xpyriment"
set width "1024"
set sampler_backend "legacy"
set keyboard_backend "legacy"
set background "black"
set subject_nr "0"
set canvas_backend "xpyriment"
set start "experiment"
set synth_backend "legacy"

define loop patch_loop
	set repeat "1"
	set description "A single block of trials"
	set skip "0"
	set offset "no"
	set item "stream_of_patches"
	set column_order ""
	set cycles "1"
	set order "random"
	run stream_of_patches

define sequence vigilance_task
	set flush_keyboard "yes"
	set description "A sequence containing a single block of trials followed by feedback to the participant"
	run define_patch_list "always"
	run patch_loop "always"

define form_multiple_choice mc
	set question ""
	set allow_multiple "no"
	set description "A simple multiple choice item"
	set advance_immediately "no"
	set options ""

define reset_feedback _reset_feedback

define sequence stream_of_patches
	set flush_keyboard "yes"
	set description "A single trial"
	run mc "never"
	run inline_script "always"
	run logger "never"

define loop experimental_loop
	set repeat "1"
	set description "A loop containing one or more experimental blocks"
	set item "vigilance_task"
	set column_order ""
	set cycles "2"
	set order "random"
	run vigilance_task

define sequence experiment
	set flush_keyboard "yes"
	set description "The main sequence of the experiment"
	run constants "always"
	run experimental_loop "always"

define inline_script inline_script
	___run__
	import pygame
	from openexp.exceptions import response_error

	# Start by playing the sound file:
	my_sampler.play()
	sampler_paused = False

	# Walk through the list of patches:
	for i in range(len(patch_list)):

		# If the sampler was paused in the previous iteration, it has
		# to be resumed.
		if sampler_paused:
			my_sampler.resume()

		# Determine the stimulus by selecting one item from the
		# stimulus list (without replacement).
		# (Of course, you might do this differently, for example
		# by defining the variable 'stim' in a loop item.)
		stim = patch_list.pop()

		# Determine the absolute path to the image in the file pool:
		path = exp.get_file(stim)

		# Set the stimulus for future use in the GUI (notably, the logger
		# item):
		exp.set("stim", stim)


		# Show the stimulus:

		# Start with a gray background for a certain duration:
		my_canvas.clear()

		# We have to draw something in order to clear the background.
		my_canvas.circle(0,0,0,color=self.get('background'))
		my_canvas.show()
		self.sleep(wait)

		# Present the patch
		my_canvas.image(path)
		my_canvas.show()

		# The patch is presented until a mouse or key response is given,
		# or a timeout (of duration ISI) occurred:

		# Geth the current time:
		start_time = self.time()

		# Give the value 'time_passed' a beginning value (0).
		time_passed = 0

		# Check for key or mouse responses until a timeout occurs:
		while time_passed < ISI:

			# Keep checking whether the duration  of this
			# while loop is still below the maximum duration
			# (i.e. ISI).
			time_passed = self.time()-start_time

			# To poll the keyboard and mouse at the same time, we use pygame
			# directly. This means that this piece of code requires the xpyriment
			# or pygame backend! See:
			# <http://www.pygame.org/docs/ref/event.html>

			# First, give the variables 'button' and 'key' the beginning
			# value 'False':
			button = False
			key = False

			# Loop through all 'events', which are key presses or button clicks
			for event in pygame.event.get([pygame.MOUSEBUTTONDOWN, pygame.KEYDOWN]):
				if event.type == pygame.MOUSEBUTTONDOWN:
					button = True
				elif event.type == pygame.KEYDOWN:
					if event.key == pygame.K_ESCAPE:
						raise response_error("The escape key was pressed.")

					# Make sure the stream is only paused by a press on the
					# space bar (and not by any key press):
					elif event.key == pygame.K_SPACE:
						key = True

			# If a key was pressed or a button was clicked, exit the loop
			if button or key:
				break

		# Set the given responses so that they will be logged by
		# the logger item. Note that for the variable "mouse_click" (see below)
		# True' indicates that a mouse click was given, whereas'False'
		# indicates that no mouse response was given. This, in combination
		# with the variable 'stim', will enable you to evaluate participants'
		# performance (i.e. whether a mouse click was correct or a false alarm, etc.):
		exp.set("mouse_click", button)

		# If a mouse response was collected, the for loop will be
		# continued. However, if the spacebar was pressed, we need to
		# do something else:
		if key:

			# Pause the sampler:
			my_sampler.pause()
			# And set 'sampler_paused' to True, such that we won't
			# forget to resumse the sound stimulus after the pause.
			sampler_paused = True

			# Show the in-the-GUI-prepared form items:
			# NOTE: the 'Run if' box for this form item should
			# be set to 'never' in the GUI.
			self.experiment.items['mc'].prepare()
			self.experiment.items['mc'].run()

		# Finally, log the responses:
		# NOTE: the 'Run if' box for this logger item should
		# be set to 'never' in the GUI.
		self.experiment.items['logger'].prepare()
		self.experiment.items['logger'].run()

		# And set the variable 'form_response' to 'NA' again.
		exp.set('form_response', "NA")
	__end__
	___prepare__
	# Create a canvas item to display the stimulus:
	global my_canvas
	from openexp.canvas import canvas
	my_canvas = canvas(exp, bgcolor = "#7F7F7F")

	# Create a sampler item that we'll need for playing
	# the sounds.
	global my_sampler
	from openexp.sampler import sampler

	# Determine the to-be-played sound file:
	sound_stim = sound_list.pop()
	sound_file = exp.get_file(sound_stim)
	my_sampler = sampler(exp, sound_file)
	__end__
	set description "Executes Python code"

define inline_script define_patch_list
	set _run ""
	___prepare__
	# Declare the visual stimulus list:
	global patch_list
	patch_list = ["horizontal.png"] * 2 + ["vertical.png"] * 1
	random.shuffle(patch_list)
	__end__
	set description "Executes Python code"

define logger logger
	set ignore_missing "yes"
	set description "Logs experimental data"
	set auto_log "yes"
	set use_quotes "yes"

define inline_script constants
	set _run ""
	___prepare__
	# Here we'll declare the global variables of the
	# experiment:

	# Import the module 'random', which we'll need to shuffle the
	# patch list:
	global random
	import random

	# Declare the sound list:
	global sound_list
	sound_list = ["sound1.wav", "sound2.wav"]
	random.shuffle(sound_list)

	# Declare durations in ms:
	global wait, ISI
	# Wait between blank screen and patch (to make it
	# flickering):
	wait = 100
	# Inter stimulus interval:
	ISI = 1000
	__end__
	set description "Executes Python code"

define reset_feedback reset_feedback